This game has debugging material. This game has a hidden level select.

A port of the original arcade game, outsourced due to...Taito somehow losing the source code.

Debug Mode

Press Down, Up, Down, Up, Right, Down, Left, Down, Up, Down on the title screen. You can use this mode to go to the next/previous level, and to show (or hide) a menu with the map number, Bub's lives, Bob's lives...